Features foliar fertilization
Compared with roots in soil fertilization, foliar fertilization has some special advantages:
(1) rapid absorption of nutrients, fertilizer better. Because foliar fertilization is directly sprayed on crops foliar nutrients, various nutrients can enter directly from the leaves of plants, crops directly involved in the metabolism and synthesis of organic matter, so the role of the speed and effectiveness of more than soil fertilization fast. Studies have shown that foliar application of fertilizers applied to the soil than the roots absorb nutrients faster, crop leaf nutrient absorption rate is much larger than the root, the effect is significant, production practices also confirmed this point, such as urea applied to the soil to go through 4 ~ 6 genius effective, but spraying can achieve nutrient absorption peak hours, only 1 to 2 days can be effective; foliar application of 2% superphosphate extracts, after five minutes after that they can transfer to plants all parts, and soil application of superphosphate 15 days in order to achieve this effect.
(2) targeted to meet the particularity required crop fertilizer, the crop can be timely and effective corrective element deficiencies. In the production of certain crops often need to solve physiological problems and special nutritional needs some fertilizer and fertilization, the use of soil nutrient fertilization will take some time to be absorbed by crops, crops can not be alleviated element deficiencies or meet the special needs of crops for nutrients, soil and foliar fertilization Fertility according to the situation, the level of soil for fertilizer and crop nutrient demand to determine the type and formulation of nutrients and nutrients through foliar application enables the rapid adoption of blade into the plant, and therefore, can replenish the crop nutrient deficiency or needed to effectively improve or correct the crop element deficiencies, especially trace element deficiency disease, by spraying some roots in soil supplemented with advantages unmatched fertilization can solve some of the special agricultural production problems, such as grapes withered neck caused by magnesium deficiency and fruit litter, only spraying magnesium fertilizer to be effective.
(3) make up the roots of nutrient absorption, increase crop yields and improve crop quality. When the crop roots absorb less time, such as: the late crop growth, due to the roots of aging, functional decline, poor ability to absorb nutrients, growth is difficult to meet after the late ripening crop nutrient demand, the impact of crop yields; or when the soil environment for crop growth unfavorable, water stagnation, drought, too acid, too alkaline, resulting in crop roots absorb nutrients disruption of crop growth and rapid recovery when needed, if the method is applied to the soil and manure crop needs can not be satisfied, if taken to spraying you can quickly add crop nutrition, crop growth and development to meet the needs. Studies have shown that the formation of crop yield in the dry matter, 90% to 95% from photosynthesis intensity and greatly improve enzyme activity, promote root absorption of nutrients, crop effectively promote the accumulation of organic matter, can be added by foliar fertilization of crop roots of inadequate nutrient absorption, can play seedlings, improve fruit setting rate and reduce the role of unfilled grains, thereby increasing crop yields and improve crop quality.
(4) improve nutrient utilization, reduce fertilizer usage. Because nutrient foliar spraying in effect from time through the soil, avoiding the absorption of nutrients in the soil fixation, leaching and biodegradation losses of crops that can be directly used to improve nutrient utilization. General soil fertilizer nitrogen utilization season only 25% to 30%, while foliar fertilization within 24 hours to absorb more than 70%, the amount of fertilizer soil fertilization only 1/10 to 1/5. Consequently, foliar fertilization the fertilizer use efficiency is far greater than soil and fertilizer, and can significantly reduce the amount of fertilizer to use. Studies have shown that cabbage by foliar spray fertilizer, reduce soil fertilizer in 25% of cases, you can still maintain the same output.
(5) fertilizer less dependent on soil conditions, nutrient utilization and stability. Soil fertilizer nutrient use a variety of factors influence soil temperature, humidity, salt, microorganisms and other subject, lower utilization and changes large and foliar fertilizer nutrients essential unrestricted soil conditions, utilization is relatively stable. For example in salinity, drought and other environmental, crop nutrient uptake is limited by the roots, spraying can play a very good complement.
(6) applied convenience, the state is not affected by crop growth and fertility period. Most of the crop growth period can be foliar fertilization, especially after sealing ridge crop plants grow, to root fertilization inconvenience, but largely unaffected by spraying plant height, density and other factors, nutrient type, concentration according to crop growth period and the status of regulation, in favor of mechanized operations. Some fruit trees and other deep root crops, if the traditional fertilization
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The method is applied to the roots is difficult to absorb the site, can not give full play to fertilizer, and spraying can achieve better results.
(7) ease heavy metal poisoning. Some of certain nutrients in the soil, or some heavy metal content is too high, and inhibit the absorption of other nutrients crops, adversely affect the growth of crops, soil fertilization is difficult to achieve the desired results, you can use a foliar spray to relieve some elements caused poison. For example, high levels of soil zinc deficiency can lead to crops, the impact caused due to soil fixation, soil applied iron fertilizer effect is not ideal, but iron can reduce leaf spraying zinc concentration, reduce zinc poisoning.
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foliar spraying with pesticides, plant growth regulators and other active substances used in conjunction with each other to promote and improve the absorption of the blade, enhancing crop resistance, pest control.
(9) to reduce the environmental pollution caused by fertilizer, application of environmental protection and safety. As we know, a lot of soil nitrogen fertilizer, is likely to cause accumulation of nitrate in groundwater and vegetables, causing harm to human health. On soil salinization, soil fertilization can increase a lot of soil solution concentration, and increase soil salinization. Less fertilizer and foliar fertilization can control the amount and type of fertilizer, applied properly can also reduce the amount of soil fertilization, according to studies, foliar fertilizer used properly can reduce soil fertilization quarter or so, which can be avoided or reduced due to the large number of soil and water pollution caused by soil fertilization, reduce soil salinization. Therefore, foliar fertilization is an environmentally friendly fertilizer technologies.
(10) economic and simple fertilization can reduce agricultural production and investment. Foliar fertilization with manure less, the effect is good, the amount of foliar fertilization is generally 10% to 20% the amount of soil fertilization, especially for some trace elements of nutrients, not only with less fertilizer efficiency, but also to avoid excessive dosage large or uneven crop damage caused by fertilizer, which can greatly reduce the cost of investment in agricultural production of fertilizer. Foliar fertilization relatively simple roots soil fertilizer operations, to avoid soil and fertilizer due to careless handling may cause mechanical damage to crops, but also can be combined with pest control spraying chemicals mixed in, too, reducing labor costs.